4.3BSD/usr/src/etc/fsck/main.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)main.c 5.4 (Berkeley) 3/5/86";
#endif not lint
#include <sys/param.h>
#include <sys/inode.h>
#include <sys/fs.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fstab.h>
#include <strings.h>
#include "fsck.h"
char *rawname(), *unrawname(), *blockcheck();
int catch(), catchquit(), voidquit();
int returntosingle;
int (*signal())();
main(argc, argv)
int argc;
char *argv[];
{
struct fstab *fsp;
int pid, passno, anygtr, sumstatus;
char *name;
sync();
while (--argc > 0 && **++argv == '-') {
switch (*++*argv) {
case 'p':
preen++;
break;
case 'b':
if (argv[0][1] != '\0') {
bflag = atoi(argv[0]+1);
} else {
bflag = atoi(*++argv);
argc--;
}
printf("Alternate super block location: %d\n", bflag);
break;
case 'd':
debug++;
break;
case 'n': /* default no answer flag */
case 'N':
nflag++;
yflag = 0;
break;
case 'y': /* default yes answer flag */
case 'Y':
yflag++;
nflag = 0;
break;
default:
errexit("%c option?\n", **argv);
}
}
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
(void)signal(SIGINT, catch);
if (preen)
(void)signal(SIGQUIT, catchquit);
if (argc) {
while (argc-- > 0) {
hotroot = 0;
checkfilesys(*argv++);
}
exit(0);
}
sumstatus = 0;
passno = 1;
do {
anygtr = 0;
if (setfsent() == 0)
errexit("Can't open checklist file: %s\n", FSTAB);
while ((fsp = getfsent()) != 0) {
if (strcmp(fsp->fs_type, FSTAB_RW) &&
strcmp(fsp->fs_type, FSTAB_RO) &&
strcmp(fsp->fs_type, FSTAB_RQ))
continue;
if (preen == 0 ||
passno == 1 && fsp->fs_passno == passno) {
name = blockcheck(fsp->fs_spec);
if (name != NULL)
checkfilesys(name);
else if (preen)
exit(8);
} else if (fsp->fs_passno > passno) {
anygtr = 1;
} else if (fsp->fs_passno == passno) {
pid = fork();
if (pid < 0) {
perror("fork");
exit(8);
}
if (pid == 0) {
(void)signal(SIGQUIT, voidquit);
name = blockcheck(fsp->fs_spec);
if (name == NULL)
exit(8);
checkfilesys(name);
exit(0);
}
}
}
if (preen) {
union wait status;
while (wait(&status) != -1)
sumstatus |= status.w_retcode;
}
passno++;
} while (anygtr);
if (sumstatus)
exit(8);
(void)endfsent();
if (returntosingle)
exit(2);
exit(0);
}
checkfilesys(filesys)
char *filesys;
{
daddr_t n_ffree, n_bfree;
struct dups *dp;
struct zlncnt *zlnp;
devname = filesys;
if (setup(filesys) == 0) {
if (preen)
pfatal("CAN'T CHECK FILE SYSTEM.");
return;
}
/*
* 1: scan inodes tallying blocks used
*/
if (preen == 0) {
printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
if (hotroot)
printf("** Root file system\n");
printf("** Phase 1 - Check Blocks and Sizes\n");
}
pass1();
/*
* 1b: locate first references to duplicates, if any
*/
if (duplist) {
if (preen)
pfatal("INTERNAL ERROR: dups with -p");
printf("** Phase 1b - Rescan For More DUPS\n");
pass1b();
}
/*
* 2: traverse directories from root to mark all connected directories
*/
if (preen == 0)
printf("** Phase 2 - Check Pathnames\n");
pass2();
/*
* 3: scan inodes looking for disconnected directories
*/
if (preen == 0)
printf("** Phase 3 - Check Connectivity\n");
pass3();
/*
* 4: scan inodes looking for disconnected files; check reference counts
*/
if (preen == 0)
printf("** Phase 4 - Check Reference Counts\n");
pass4();
/*
* 5: check and repair resource counts in cylinder groups
*/
if (preen == 0)
printf("** Phase 5 - Check Cyl groups\n");
pass5();
/*
* print out summary statistics
*/
n_ffree = sblock.fs_cstotal.cs_nffree;
n_bfree = sblock.fs_cstotal.cs_nbfree;
pwarn("%d files, %d used, %d free ",
n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
n_ffree, n_bfree, (float)(n_ffree * 100) / sblock.fs_dsize);
if (debug && (n_files -= imax - ROOTINO - sblock.fs_cstotal.cs_nifree))
printf("%d files missing\n", n_files);
if (debug) {
n_blks += sblock.fs_ncg *
(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
if (n_blks -= fmax - (n_ffree + sblock.fs_frag * n_bfree))
printf("%d blocks missing\n", n_blks);
if (duplist != NULL) {
printf("The following duplicate blocks remain:");
for (dp = duplist; dp; dp = dp->next)
printf(" %d,", dp->dup);
printf("\n");
}
if (zlnhead != NULL) {
printf("The following zero link count inodes remain:");
for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
printf(" %d,", zlnp->zlncnt);
printf("\n");
}
}
zlnhead = (struct zlncnt *)0;
duplist = (struct dups *)0;
if (dfile.mod) {
(void)time(&sblock.fs_time);
sbdirty();
}
ckfini();
free(blockmap);
free(statemap);
free((char *)lncntp);
if (!dfile.mod)
return;
if (!preen) {
printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
if (hotroot)
printf("\n***** REBOOT UNIX *****\n");
}
if (hotroot) {
sync();
exit(4);
}
}
char *
blockcheck(name)
char *name;
{
struct stat stslash, stblock, stchar;
char *raw;
int looped = 0;
hotroot = 0;
if (stat("/", &stslash) < 0){
printf("Can't stat root\n");
return (0);
}
retry:
if (stat(name, &stblock) < 0){
printf("Can't stat %s\n", name);
return (0);
}
if (stblock.st_mode & S_IFBLK) {
raw = rawname(name);
if (stat(raw, &stchar) < 0){
printf("Can't stat %s\n", raw);
return (0);
}
if (stchar.st_mode & S_IFCHR) {
if (stslash.st_dev == stblock.st_rdev) {
hotroot++;
raw = unrawname(name);
}
return (raw);
} else {
printf("%s is not a character device\n", raw);
return (0);
}
} else if (stblock.st_mode & S_IFCHR) {
if (looped) {
printf("Can't make sense out of name %s\n", name);
return (0);
}
name = unrawname(name);
looped++;
goto retry;
}
printf("Can't make sense out of name %s\n", name);
return (0);
}
char *
unrawname(cp)
char *cp;
{
char *dp = rindex(cp, '/');
struct stat stb;
if (dp == 0)
return (cp);
if (stat(cp, &stb) < 0)
return (cp);
if ((stb.st_mode&S_IFMT) != S_IFCHR)
return (cp);
if (*(dp+1) != 'r')
return (cp);
(void)strcpy(dp+1, dp+2);
return (cp);
}
char *
rawname(cp)
char *cp;
{
static char rawbuf[32];
char *dp = rindex(cp, '/');
if (dp == 0)
return (0);
*dp = 0;
(void)strcpy(rawbuf, cp);
*dp = '/';
(void)strcat(rawbuf, "/r");
(void)strcat(rawbuf, dp+1);
return (rawbuf);
}